/Engine/Source/Runtime/Online/Experimental/EventLoop/Public/EventLoop/EventLoopManagedStorage.h
NOT thread safe.
The number of changes which occurred.
uint32 Update ( [FInternalHandleArryType](API\Runtime\EventLoop\EventLoop\TManagedStorage\FInternalHandleArryType) * OutAddedHandles, [FInternalHandleArryType](API\Runtime\EventLoop\EventLoop\TManagedStorage\FInternalHandleArryType) * OutRemovedHandles )